Screw conveyer

Abstract

According to the technical scheme, the spiral conveyor comprises a machine frame, a conveying assembly is arranged on the machine frame, a cleaning assembly is arranged on the conveying assembly, the conveying assembly comprises a gear motor fixedly connected with the machine frame, and a machine shell and a bearing seat are further arranged on the machine frame. According to the spiral conveyor, through the arrangement of the cleaning assembly, when conveyed materials are affected with damp or have high viscosity due to high water content, when a user uses the spiral conveyor, the position of the driving frame is adjusted, so that the cam can be matched with the driving frame to drive the connecting rod to move in the direction close to or away from the main shaft; the scraper blade can be inserted into the gap between the spiral blades, the spiral blades move relative to the scraper blade, the scraper blade can scrape materials adhering to the spiral blades, the blocking risk of the spiral conveyor is eliminated, stable operation of the spiral conveyor is guaranteed, and then the connecting rod drives the scraper blade to leave the gap between the spiral blades.

Description

Technical Field

[0001] The utility model relates to a screw conveyor and belongs to the technical field of conveying equipment. Background Art

[0002] Screw conveyor is a machine that uses a motor to drive the conveying screw to rotate and push materials to achieve the purpose of conveying. Screw conveyors are divided into two types in terms of conveying form: shaft screw conveyors and shaftless screw conveyors, and in terms of appearance, they are divided into U-shaped screw conveyors and tubular screw conveyors. Its working principle is that the rotating spiral blades push the materials to be conveyed by the screw conveyor. The force that prevents the materials from rotating with the screw conveyor blades is the weight of the materials themselves and the friction resistance of the screw conveyor casing to the materials, and finally the purpose of evenly discharging the materials at the discharge port is achieved.

[0003] Screw conveyors are widely used for non-sticky dry powder materials and small particle materials, such as cement, fly ash, lime, grain, etc. In actual use, such materials are easily adhered to the blades of the screw conveyor due to moisture and other factors, which leads to blockage of the screw conveyor. The screw conveyor needs to be shut down and cleaned, which not only affects the work efficiency, but also makes it more troublesome to clean the blocked screw conveyor. For example, the anti-blocking dust screw conveyor proposed in the publication number CN204038435U adopts the method of equipment cleaning port to facilitate subsequent cleaning operations, but does not achieve the problem of prevention and avoidance. Therefore, we propose a screw conveyor. Utility Model Content

[0004] The technical problem to be solved by the utility model overcomes the existing defects and can effectively solve the problems in the background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A screw conveyor comprises a frame, a conveying assembly is arranged on the frame, and a cleaning assembly is arranged on the conveying assembly, wherein:

[0007] The conveying assembly includes a reduction motor fixedly connected to a frame, a housing and a bearing seat are also provided on the frame, a main shaft is fixedly connected to the output end of the reduction motor, the main shaft passes through the bearing seat and is inserted into the housing, and a spiral blade is provided on the main shaft located in the conveying housing;

[0008] The cleaning assembly includes a mounting frame fixedly connected to the casing, a connecting rod slidably connected to the mounting frame, and a scraper is slidably connected to the side of the connecting rod close to the casing, sliders are slidably connected to both sides of the scraper, a slide groove is provided on one side of the casing, the slider is slidably connected to the slide groove, a cam is provided on the side wall fixing sleeve of the main shaft, and the cam is located between the bearing seat and the casing, a driving rod is fixedly connected to one end of the connecting rod close to the reduction motor, and a driving frame is slidably connected to the one end of the driving rod close to the reduction motor, and the driving frame is arranged to abut against the cam.

[0009] Preferably, the cam comprises a pipe hoop, the pipe hoop is fixedly connected to the main shaft, a counterweight is fixedly connected to one side of the pipe hoop, and a fan-shaped plate is fixedly connected to the side wall of the pipe hoop away from the counterweight.

[0010] Preferably, a stopper is fixedly connected to one side of the connecting rod close to the housing, and a compression spring is fixedly connected to one side of the stopper, and one end of the compression spring away from the stopper is fixedly connected to the scraper.

[0011] Preferably, the width of the scraper is less than or equal to the pitch of the spiral blade, a protective block is provided on the side of the scraper close to the reduction motor, and a clearance groove matching the protective block is provided on the slide groove.

[0012] Preferably, a blocking bar is slidably connected in the slide groove, and the blocking bar is fixedly connected to the sliding block.

[0013] Preferably, the casing comprises a main body, a feed port and a discharge port are provided on the main body, a humidity sensor is arranged in the feed port, and the humidity sensor is electrically connected to an alarm. Beneficial Effects

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. This type of screw conveyor is provided with a cleaning component. When the conveyed material is damp or has a high water content and is viscous, the user adjusts the position of the drive frame when using the screw conveyor so that the cam can cooperate with the drive frame to drive the connecting rod to move toward or away from the main shaft, so that the scraper can be inserted into the gap between the spiral leaves, and the spiral leaves and the scraper move relative to each other, so that the scraper can scrape off the material stuck on the spiral leaves, eliminating the risk of blockage of the screw conveyor and ensuring the stable operation of the screw conveyor. Then the connecting rod drives the scraper to leave the gap between the spiral leaves.

[0016] 2. This type of screw conveyor, by setting a pipe clamp with a counterweight and a fan-shaped plate, fixes the cam on the main shaft and uses the counterweight to achieve the counterweight balance of the entire cam, so that the main shaft will not shake when rotating, ensuring the stability of the equipment operation. By setting a protective block with a clearance groove, the scraper is ensured to be inserted into the spiral blade gap in the correct position to avoid the scraper and spiral blade colliding and causing damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial structural schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the scraper and the spiral blade in the working state of the utility model;

[0021] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 5 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 6 This is a schematic diagram of the baffle structure of the utility model.

[0024] In the figure: 1. frame; 2. reduction motor; 3. casing; 4. bearing seat; 5. main shaft; 6. spiral blade; 7. mounting frame; 8. connecting rod; 9. scraper; 10. cam; 101. pipe clamp; 102. counterweight; 103. fan plate; 11. slider; 12. driving rod; 13. driving frame; 14. block; 15. compression spring; 16. protective block; 17. baffle; 18. humidity sensor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example

[0027] See also Figure 1-5 A screw conveyor comprises a frame 1, a conveying assembly is arranged on the frame 1, and a cleaning assembly is arranged on the conveying assembly, wherein:

[0028] The conveying assembly includes a reduction motor 2 fixedly connected to a frame 1, the reduction motor 2 is a motor with a reduction gear set, and a housing 3 and a bearing seat 4 are also provided on the frame 1. A main shaft 5 is fixedly connected to the output end of the reduction motor 2, and the main shaft 5 passes through the bearing seat 4 and is inserted into the housing 3. A spiral blade 6 is provided on the main shaft 5 located in the conveying housing 3;

[0029] The cleaning assembly includes a mounting frame 7 fixedly connected to the housing 3, the mounting frame 7 is arranged on one side of the housing 3, a connecting rod 8 is slidably connected to the mounting frame 7, and a scraper 9 is slidably connected to the side of the connecting rod 8 close to the housing 3, and sliders 11 are slidably connected to both sides of the scraper 9, a slide groove is provided on one side of the housing 3, and the slider 11 is slidably connected to the slide groove, wherein the scraper 9 can slide relative to the connecting rod 8 and the slide groove along the axis direction of the main shaft 5, and the scraper 9 and the slider 11 can slide in the direction close to or away from the main shaft 5. The side wall fixing sleeve of the main shaft 5 is provided with a cam 10, and the cam 10 is arranged between the bearing seat 4 and the casing 3, the end of the connecting rod 8 close to the reduction motor 2 is fixedly connected with a driving rod 12, and the end of the driving rod 12 close to the reduction motor 2 is slidably connected with a driving frame 13, the driving frame 13 is arranged against the cam 10, wherein the driving frame 13 can slide in the horizontal direction along the driving rod 12, and a bolt is threadedly connected on the driving rod 12, which is used to fix the driving frame 13 when the cleaning component is running.

[0030] Furthermore, the cam 10 includes a pipe clamp 101, which is fixedly connected to the main shaft 5. A counterweight 102 is fixedly connected to one side of the pipe clamp 101, and a fan-shaped plate 103 is fixedly connected to the side wall of the pipe clamp 101 away from the counterweight 102, wherein the fan-shaped plate 103 can also adopt a hollow design to achieve lightweight of the entire cam 10 and reduce the operating load of the equipment. The pipe clamp 101 is used to fix the cam 10 as a whole on the main shaft 5, while the counterweight 102 is used to achieve counterweight balance of the entire cam 10, so that the main shaft 5 will not shake when rotating, thereby ensuring the stability of the equipment operation.

[0031] Furthermore, a stopper 14 is fixedly connected to one side of the connecting rod 8 close to the casing 3, and a compression spring 15 is fixedly connected to one side of the stopper 14. The end of the compression spring 15 away from the stopper 14 is fixedly connected to the scraper 9. When conveying in the vertical direction or at an angle, gravity can be used to automatically reset the scraper 9, and when conveying in the horizontal direction, the compression spring 15 can be used to reset the scraper 9.

[0032] Furthermore, the width of the scraper 9 is less than or equal to the pitch of the spiral blade 6, and a protective block 16 is provided on the side of the scraper 9 close to the reduction motor 2. A clearance groove matching the protective block 16 is opened on the slide groove. The scraper 9 needs to be inserted into the gap of the spiral blade 6. When it comes to materials that are easy to stick, if the width of the scraper 9 is equal to the pitch of the spiral blade 6, both sides of the scraper 9 can be cleaned. Since the screw conveyor will generate a certain amount of vibration during operation, a protective block 16 is provided on the scraper 9 to cooperate with the clearance groove to more accurately adjust the position of the scraper 9 inserted into the spiral blade 6 to avoid direct collision between the scraper 9 and the edge of the spiral blade 6, causing damage to the equipment.

[0033] Furthermore, a baffle 17 is slidably connected in the chute, and the baffle 17 is fixedly connected to the slider 11. When powder materials are transported, materials are prone to overflow from the chute, so a baffle 17 is provided to block the overflow, thereby preventing the materials from leaking out and polluting the on-site environment and causing material waste. More specifically, a groove for accommodating the baffle 17 is provided on the inner wall of the casing 3, so as to ensure that the baffle 17 can always close the chute.

[0034] Furthermore, the housing 3 includes a main body, which is provided with a feed port and a discharge port. A humidity sensor 18 is arranged in the feed port, and the humidity sensor 18 is electrically connected to an alarm. The humidity sensor 18 is mainly used to monitor the humidity of the material and to provide prompts to the user in conjunction with the alarm, mainly for materials that have no obvious appearance changes after being damp.

[0035] Working principle: When using this type of screw conveyor, when conveying normal materials, the driving frame 13 is slid so that it is not in the same vertical plane with the cam 10, so that the cam 10 will not drive the driving frame 13 to move. When the material has high humidity or high viscosity, the user can slide the driving frame 13 so that the cam 10 and the driving frame 13 are in the same vertical plane. At this time, the bolts can be tightened so that the bolts and the driving frame 13 are against each other, and the driving frame 13 is fixed there. When the main shaft 5 rotates with the reduction motor 2, the part with a larger outer diameter of the cam 10 will abut against the inner wall of the driving frame 13 on the side close to the connecting rod 8, so that the driving frame 13 moves in the direction away from the main shaft 5, and then the cam 10 continues to rotate, and the part with a larger outer diameter of the cam 10 will abut against the inner wall of the side of the driving frame 13 away from the connecting rod 8, and drive the driving frame 13 to move in the direction away from the connecting rod 8, so that the driving frame 13 performs reciprocating motion, and the driving frame 13 drives the connecting rod 8 to move in the direction close to or away from the main shaft 5. When the connecting rod 8 moves toward the main shaft 5 When the cam 10 moves in the direction of rotation, the scraper 9 is driven to insert into the gap between the pitches of the spiral blades 6. At this time, the scraper 9 is against the spiral blades 6, and the scraper 9 can only slide along the direction of the slide groove, so that the scraper 9 can only move in the material conveying direction with the spiral blades 6. At this time, the scraper 9 can scrape off the material stuck on the spiral blades 6 to avoid the material from moving synchronously with the spiral blades 6, resulting in the inability to convey the material, and then causing the conveyor to be blocked. As the cam 10 continues to rotate, it will drive the connecting rod 8 to move away from the main shaft 5, and then the scraper 9 leaves the gap between the spiral blades 6 and returns to the initial position under the elastic action of gravity or the compression spring 15, and then the next scraping operation can be carried out. It should be noted that since the cam 10 and the main shaft 5 are relatively stationary, it can be ensured that when the scraper 9 is inserted into the gap between the spiral blades 6, it will not collide with the spiral blades 6. In this type of screw conveyor, the scraping operation is mainly carried out in advance after the material changes to eliminate the risk of blockage of the screw conveyor and ensure the stable operation of the conveying operation.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw conveyor, characterized in that it comprises a frame (1), a conveying assembly is arranged on the frame (1), and a cleaning assembly is arranged on the conveying assembly, wherein: The conveying assembly comprises a reduction motor (2) fixedly connected to a frame (1); a housing (3) and a bearing seat (4) are also provided on the frame (1); a main shaft (5) is fixedly connected to the output end of the reduction motor (2); the main shaft (5) passes through the bearing seat (4) and is inserted into the housing (3); and a spiral blade (6) is provided on the main shaft (5) located in the conveying housing (3); The cleaning assembly comprises a mounting frame (7) fixedly connected to the casing (3), a connecting rod (8) being slidably connected to the mounting frame (7), and a scraper (9) being slidably connected to the side of the connecting rod (8) close to the casing (3), sliders (11) being slidably connected to both sides of the scraper (9), a slide groove being provided on one side of the casing (3), the slider (11) being slidably connected to the slide groove, a cam (10) being provided on the side wall fixing sleeve of the main shaft (5), and the cam (10) being arranged between the bearing seat (4) and the casing (3), a driving rod (12) being fixedly connected to one end of the connecting rod (8) close to the reduction motor (2), and a driving frame (13) being slidably connected to the one end of the driving rod (12) close to the reduction motor (2), and the driving frame (13) being arranged to abut against the cam (10).

2. A screw conveyor according to claim 1, characterized in that: The cam (10) comprises a pipe hoop (101), the pipe hoop (101) being fixedly connected to the main shaft (5), a counterweight block (102) being fixedly connected to one side of the pipe hoop (101), and a fan-shaped plate (103) being fixedly connected to a side wall of the pipe hoop (101) away from the counterweight block (102).

3. A screw conveyor according to claim 1, characterized in that: A stopper (14) is fixedly connected to the side of the connecting rod (8) close to the housing (3), and a compression spring (15) is fixedly connected to one side of the stopper (14); an end of the compression spring (15) away from the stopper (14) is fixedly connected to the scraper (9).

4. A screw conveyor according to claim 1, characterized in that: The width of the scraper (9) is less than or equal to the pitch of the spiral blade (6); a protective block (16) is provided on a side of the scraper (9) close to the reduction motor (2); and a clearance groove matching the protective block (16) is provided on the slide groove.

5. The screw conveyor according to claim 1, characterized in that: A blocking bar (17) is also slidably connected in the slide groove, and the blocking bar (17) is fixedly connected to the slide block (11).

6. A screw conveyor according to claim 1, characterized in that: The casing (3) comprises a main body, the main body is provided with a feed inlet and a discharge port, a humidity sensor (18) is arranged in the feed inlet, and the humidity sensor (18) is electrically connected to an alarm.

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